US7746243B2 - Pump failure alarm device - Google Patents

Pump failure alarm device Download PDF

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Publication number
US7746243B2
US7746243B2 US11/874,917 US87491707A US7746243B2 US 7746243 B2 US7746243 B2 US 7746243B2 US 87491707 A US87491707 A US 87491707A US 7746243 B2 US7746243 B2 US 7746243B2
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Prior art keywords
coupled
resistor
terminal
voltage
outputting
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Expired - Fee Related, expires
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US11/874,917
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US20080157989A1 (en
Inventor
Ying Chen
Jin-Liang Xiong
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Assigned to HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD. reassignment HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, YING, XIONG, JIN-LIANG
Publication of US20080157989A1 publication Critical patent/US20080157989A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps

Definitions

  • the present invention relates to alarm devices, and particularly to an alarm device for indicating a failure of pumps in a computer system.
  • An exemplary alarm device for pumps includes two digital-analog converting circuits, a voltage sampling circuit, a controlling circuit, an I/O controller, and an alarm circuit.
  • the digital-analog converting circuits receive digital pulse signals from two pumps, and respectively output a DC voltage signal at an output terminal when the pumps run normally.
  • the voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, outputs a first voltage signal when the two pumps run normally and outputs a second voltage signal when either or both of the pumps stop running.
  • the controlling circuit receives the voltage signals from the voltage sampling circuit, and outputs a first control signal when it receives the first voltage signal and outputs a second control signal when it receives the second voltage signal.
  • the I/O controller receives the control signals from the controlling circuit, and outputs an alarm signal when it receives the second control signal.
  • the alarm circuit receives the alarm signal from the I/O controller, and activates an alarm.
  • the drawing is a circuit diagram of an embodiment of an alarm device for pumps in accordance with the present invention.
  • an alarm device for pumps in accordance with an embodiment of the present invention includes two digital-analog converting circuits 100 , 110 , two diodes D 11 , D 12 , a voltage sampling circuit 120 , a controlling circuit 130 , an input-output (I/O) controller U 11 , and an alarm circuit 140 .
  • the digital-analog converting circuit 100 includes a resistor R 11 and a capacitor C 11 .
  • One terminal of the resistor R 11 is coupled to a pump 200
  • the other terminal of the resistor R 11 is coupled to one terminal of the capacitor C 11
  • the other terminal of the capacitor C 11 is coupled to ground.
  • the digital-analog converting circuit 110 includes a resistor R 12 and a capacitor C 12 .
  • One terminal of the resistor R 12 is coupled to a pump 210
  • the other terminal of the resistor R 12 is coupled to one terminal of the capacitor C 12
  • the other terminal of the capacitor C 12 is coupled to ground.
  • a node between the resistor R 11 and the capacitor C 11 is coupled to the anode of the diode D 11 .
  • a node between the resistor R 12 and the capacitor C 12 is coupled to the anode of the diode D 12 .
  • the voltage sampling circuit 120 includes three resistors R 13 , R 14 , R 15 .
  • One terminal of each of the resistors R 13 , R 14 is respectively coupled to the cathodes of the diodes D 11 , D 12 , the other terminals of the resistors R 13 , R 14 are coupled to one terminal of the resistor R 15 , the other terminal of the resistor R 15 is coupled to ground.
  • the controlling circuit 130 includes two transistors Q 11 , Q 12 , and two resistors R 16 , R 17 .
  • the base of the transistor Q 11 is coupled to a node between the resistors R 13 and R 14 .
  • the collector of the transistor Q 11 is coupled to the base of the transistor Q 12 , and coupled to a power supply Vcc 1 via the resistor R 16 .
  • the collector of the transistor Q 12 is coupled to the power supply Vcc 1 via the resistor R 17 , and coupled to an input terminal of the I/O controller U 11 .
  • the emitters of the transistors Q 11 , Q 12 are coupled to ground.
  • the alarm circuit 140 includes a transistor Q 13 , a buzzer LS 1 , and two resistors R 18 , R 19 .
  • the base of the transistor Q 13 is coupled to an output terminal of the I/O controller U 11 , and coupled to a power supply Vcc 2 via the resistor R 19 .
  • the collector of the transistor Q 13 is coupled to one terminal of the buzzer LS 1 , the other terminal of the buzzer LS 1 is coupled to the power supply Vcc 2 via the resistor R 18 .
  • the emitter of the transistor Q 13 is coupled to ground.
  • the pumps 200 , 210 respectively receive 12V direct current voltage from a power supply J 1 and are driven by the power supply J 1 .
  • the pumps 200 , 210 run normally, the pumps 200 , 210 respectively output a digital pulse signal.
  • the digital-analog converting circuits 100 , 110 respectively receive the digital pulse signals from the pumps 200 , 210 , and output a first direct current (DC) voltage signal and a second DC voltage signal.
  • the diodes D 11 , D 12 are on, the first and second DC voltage signals are output to the voltage sampling circuit 120 , and are superimposed at the output terminal of the voltage sampling circuit 120 . Voltage at the base of the transistor Q 11 is at a high level, the transistor Q 11 turns on.
  • the controlling circuit 130 outputs a high level voltage to the I/O controller U 11 , the I/O controller U 11 receives the high level voltage, and outputs a low level voltage to the alarm circuit 140 .
  • the transistor Q 13 is off, and the buzzer LS 1 is not activated.
  • the failed pump or pumps 200 , 210 will not output a digital pulse signal.
  • one or both of the diodes D 11 , D 12 turn off, voltage at the base of the first transistor Q 11 goes low, the first transistor Q 11 turns off, the second transistor Q 12 turns on, the controlling circuit 130 outputs a low level voltage to the I/O controller U 11 , the I/O controller U 11 outputs a high level voltage to the alarm circuit 140 , the transistor Q 13 turns on, and the buzzer LS 1 is activated to sound an alarm indicating that one or both of the pumps 200 , 210 have failed.
  • the diodes D 11 , D 12 are respectively used to protect the pumps 200 , 210 .
  • the pump 200 stops running but the pump 210 runs normally the second DC voltage signal output from the digital-analog converting circuit 110 will not go though the diode D 11 , and protects the pump 200 from being ruined.
  • the pump 210 stops running but the pump 200 runs normally the first DC voltage signal output from the digital-analog converting circuit 100 will not go though the diode D 12 , and protects the pump 210 from being ruined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A pump failure alarm device includes two digital-analog converting circuits (100, 110), a voltage sampling circuit (120), a controlling circuit (130), an I/O controller (U11), and an alarm circuit (140). The digital-analog converting circuits receive digital pulse signals from two pumps (200, 210), and respectively output a DC voltage signal at an output terminal when the pumps run normally. The voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, and outputs a first voltage signal when the two pumps run normally and outputs a second voltage signal when either or both of the pumps stop running. The controlling circuit receives the voltage signals from the voltage sampling circuit, and outputs a first control signal when it receives the first voltage signal and outputs a second control signal when it receives the second voltage signal. The I/O controller receives the control signals from the controlling circuit, and outputs an alarm signal when it receives the second control signal. The alarm circuit receives the alarm signal from the I/O controller, and activates an alarm.

Description

CROSS-REFERENCES TO RELATED APPLICATION
This application is related to a co-pending application entitled with “FAN FAILURE ALARM DEVICE”, filed on Sep. 20, 2007 with application Ser. No. 11/858,122, and assigned to the same assignee of the present invention.
BACKGROUND
1. Field of the Invention
The present invention relates to alarm devices, and particularly to an alarm device for indicating a failure of pumps in a computer system.
2. Description of Related Art
Developments in today's highly information-intensive society have led to remarkable improvements in performances of electronic devices. During operation of many contemporary electronic devices such as central processing units (CPUs), large amounts of heat are produced. Typically, two pumps are used to facilitate removal of heat. One pump is used to pump water, the other pump is used to drain water. The pumps must be running stably, so as to prevent the device from becoming unstable or being damaged. If either or both of the pumps run unstably or even cease running, heat generated from the CPU will not be dissipated on time and will ruin the CPU.
What is needed, therefore, is to provide an alarm device for when pump(s) stop running in a computer system.
SUMMARY
An exemplary alarm device for pumps includes two digital-analog converting circuits, a voltage sampling circuit, a controlling circuit, an I/O controller, and an alarm circuit. The digital-analog converting circuits receive digital pulse signals from two pumps, and respectively output a DC voltage signal at an output terminal when the pumps run normally. The voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, outputs a first voltage signal when the two pumps run normally and outputs a second voltage signal when either or both of the pumps stop running. The controlling circuit receives the voltage signals from the voltage sampling circuit, and outputs a first control signal when it receives the first voltage signal and outputs a second control signal when it receives the second voltage signal. The I/O controller receives the control signals from the controlling circuit, and outputs an alarm signal when it receives the second control signal. The alarm circuit receives the alarm signal from the I/O controller, and activates an alarm.
Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
The drawing is a circuit diagram of an embodiment of an alarm device for pumps in accordance with the present invention.
 DETAILED DESCRIPTION
Referring to the drawing, an alarm device for pumps in accordance with an embodiment of the present invention includes two digital- analog converting circuits 100, 110, two diodes D11, D12, a voltage sampling circuit 120, a controlling circuit 130, an input-output (I/O) controller U11, and an alarm circuit 140.
In this embodiment, the digital-analog converting circuit 100 includes a resistor R11 and a capacitor C11. One terminal of the resistor R11 is coupled to a pump 200, the other terminal of the resistor R11 is coupled to one terminal of the capacitor C11, the other terminal of the capacitor C11 is coupled to ground. The digital-analog converting circuit 110 includes a resistor R12 and a capacitor C12. One terminal of the resistor R12 is coupled to a pump 210, the other terminal of the resistor R12 is coupled to one terminal of the capacitor C12, the other terminal of the capacitor C12 is coupled to ground. A node between the resistor R11 and the capacitor C11 is coupled to the anode of the diode D11. A node between the resistor R12 and the capacitor C12 is coupled to the anode of the diode D12.
The voltage sampling circuit 120 includes three resistors R13, R14, R15. One terminal of each of the resistors R13, R14 is respectively coupled to the cathodes of the diodes D11, D12, the other terminals of the resistors R13, R14 are coupled to one terminal of the resistor R15, the other terminal of the resistor R15 is coupled to ground.
The controlling circuit 130 includes two transistors Q11, Q12, and two resistors R16, R17. The base of the transistor Q11 is coupled to a node between the resistors R13 and R14. The collector of the transistor Q11 is coupled to the base of the transistor Q12, and coupled to a power supply Vcc1 via the resistor R16. The collector of the transistor Q12 is coupled to the power supply Vcc1 via the resistor R17, and coupled to an input terminal of the I/O controller U11. The emitters of the transistors Q11, Q12 are coupled to ground.
The alarm circuit 140 includes a transistor Q13, a buzzer LS1, and two resistors R18, R19. The base of the transistor Q13 is coupled to an output terminal of the I/O controller U11, and coupled to a power supply Vcc2 via the resistor R19. The collector of the transistor Q13 is coupled to one terminal of the buzzer LS1, the other terminal of the buzzer LS1 is coupled to the power supply Vcc2 via the resistor R18. The emitter of the transistor Q13 is coupled to ground.
The pumps 200, 210 respectively receive 12V direct current voltage from a power supply J1 and are driven by the power supply J1. When the pumps 200, 210 run normally, the pumps 200, 210 respectively output a digital pulse signal. The digital- analog converting circuits 100, 110 respectively receive the digital pulse signals from the pumps 200, 210, and output a first direct current (DC) voltage signal and a second DC voltage signal. The diodes D11, D12 are on, the first and second DC voltage signals are output to the voltage sampling circuit 120, and are superimposed at the output terminal of the voltage sampling circuit 120. Voltage at the base of the transistor Q11 is at a high level, the transistor Q11 turns on. Voltage at the collector of the transistor Q11 is at a low level, the transistor Q12 is off. The controlling circuit 130 outputs a high level voltage to the I/O controller U11, the I/O controller U11 receives the high level voltage, and outputs a low level voltage to the alarm circuit 140. The transistor Q13 is off, and the buzzer LS1 is not activated.
If either or both of the pumps 200, 210 stop running then the failed pump or pumps 200, 210 will not output a digital pulse signal. In that case, one or both of the diodes D11, D12 turn off, voltage at the base of the first transistor Q11 goes low, the first transistor Q11 turns off, the second transistor Q12 turns on, the controlling circuit 130 outputs a low level voltage to the I/O controller U11, the I/O controller U11 outputs a high level voltage to the alarm circuit 140, the transistor Q13 turns on, and the buzzer LS1 is activated to sound an alarm indicating that one or both of the pumps 200, 210 have failed.
In this embodiment, the diodes D11, D12 are respectively used to protect the pumps 200, 210. When the pump 200 stops running but the pump 210 runs normally, the second DC voltage signal output from the digital-analog converting circuit 110 will not go though the diode D11, and protects the pump 200 from being ruined. When the pump 210 stops running but the pump 200 runs normally, the first DC voltage signal output from the digital-analog converting circuit 100 will not go though the diode D12, and protects the pump 210 from being ruined.
The foregoing description of the exemplary embodiment of the invention has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiment was chosen and described in order to explain the principles of the invention and its practical application so as to enable others skilled in the art to utilize the invention and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present invention pertains without departing from its spirit and scope. Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing description and the exemplary embodiment described therein.

Claims (7)

1. A pump failure alarm device, comprising:
two digital-analog converting circuits configured for receiving digital pulse signals respectively from two pumps, and respectively outputting a direct current (DC) voltage signal at an output terminal when the pumps run normally, wherein each digital-analog converting circuit comprises a resistor and a capacitor, one terminal of each of the resistors is coupled to a corresponding pump, the other terminal of each of the resistors acting as the output terminal of each digital-analog converting circuits coupled to one terminal of a corresponding capacitor, another terminal of each of the capacitors is coupled to ground;
a voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, and outputting a first voltage signal when the two pumps run normally and outputting a second voltage signal when either or both of the pumps stop running;
a controlling circuit configured for receiving the voltage signals from the voltage sampling circuit, and outputting a first control signal when it receives the first voltage signal and outputting a second control signal when it receives the second voltage signal;
an input-output (I/O) controller with an input terminal receiving the control signals from the controlling circuit, and outputting an alarm signal at an output terminal when it receives the second control signal; and
an alarm circuit configured for receiving the alarm signal from the I/O controller, and activating an alarm.
2. The pump failure alarm device as claimed in claim 1, further comprising two diodes with anodes respectively coupled to the output terminals of the two digital-analog converting circuits, cathodes of the diodes respectively coupled to the two input terminals of the voltage sampling circuit.
3. The pump failure alarm device as claimed in claim 1, wherein the voltage sampling circuit comprises a first resistor, a second resistor, and a third resistor, one terminal of the first and second resistors respectively acting as the two input terminals of the voltage sampling circuit, the other terminals of the first and second resistors are both coupled to one terminal of the third resistor, and the other terminal of the third resistor is coupled to ground.
4. The pump failure alarm device as claimed in claim 3, wherein the controlling circuit comprises a first transistor, and a second transistor, the base of the first transistor is coupled to a node between the first and second resistors, the collector of the first transistor is coupled to the base of the second transistor, the collector of the second transistor is coupled to the input terminal of the I/O controller, the collectors of the first and second transistors are coupled to a power supply respectively via a fourth resistor and a fifth resistor, and the emitters of the first and second transistors are coupled to ground.
5. The pump failure alarm device as claimed in claim 1, wherein the alarm circuit comprises a third transistor, a buzzer, a sixth resistor, and a seventh resistor, the base of the third transistor is coupled to the output terminal of the I/O controller, and also coupled to another power supply via the sixth resistor, the emitter of the third transistor is coupled to ground, the collector of the third transistor is coupled to one terminal of the buzzer, the other terminal of the buzzer is coupled to the power supply via the seventh resistor.
6. A pump failure alarm device, comprising:
two digital-analog converting circuits configured for receiving digital pulse signals respectively from two pumps, and respectively outputting a direct current (DC) voltage signal at an output terminal when the pumps run normally;
a voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, and outputting a first voltage signal when the two pumps run normally and outputting a second voltage signal when either or both of the pumps stop running, wherein the voltage sampling circuit comprises a first resistor, a second resistor, and a third resistor, one terminal of the first and second resistors respectively acting as the two input terminals of the voltage sampling circuit, the other terminals of the first and second resistors are both coupled to one terminal of the third resistor, and the other terminal of the third resistor is coupled to ground;
a controlling circuit configured for receiving the voltage signals from the voltage sampling circuit, and outputting a first control signal when it receives the first voltage signal and outputting a second control signal when it receives the second voltage signal;
an input-output (I/O) controller with an input terminal receiving the control signals from the controlling circuit, and outputting an alarm signal at an output terminal when it receives the second control signal; and
an alarm circuit configured for receiving the alarm signal from the I/O controller, and activating an alarm.
7. A pump failure alarm device, comprising:
two digital-analog converting circuits configured for receiving digital pulse signals respectively from two pumps, and respectively outputting a direct current (DC) voltage signal at an output terminal when the pumps run normally;
a voltage sampling circuit with two input terminals respectively coupled to the output terminals of the two digital-analog converting circuits, and outputting a first voltage signal when the two pumps run normally and outputting a second voltage signal when either or both of the pumps stop running;
a controlling circuit configured for receiving the voltage signals from the voltage sampling circuit, and outputting a first control signal when it receives the first voltage signal and outputting a second control signal when it receives the second voltage signal;
an input-output (I/O) controller with an input terminal receiving the control signals from the controlling circuit, and outputting an alarm signal at an output terminal when it receives the second control signal; and
an alarm circuit configured for receiving the alarm signal from the I/O controller, and activating an alarm, wherein the alarm circuit comprises a transistor, a buzzer, a first resistor, and a second resistor, the base of the transistor is coupled to the output terminal of the I/O controller, and also coupled to a power supply via the first resistor, the emitter of the transistor is coupled to ground, the collector of the transistor is coupled to one terminal of the buzzer, the other terminal of the buzzer is coupled to the power supply via the second resistor.
US11/874,917 2006-12-29 2007-10-19 Pump failure alarm device Expired - Fee Related US7746243B2 (en)

Applications Claiming Priority (3)

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CNA200610201463XA CN101211307A (en) 2006-12-29 2006-12-29 Mainboard water pump failure alarm circuit
CN200610201463.X 2006-12-29
CN200610201463 2006-12-29

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080229819A1 (en) * 2007-03-19 2008-09-25 Wayne Water Systems, Inc./Scott Fetzer Company Capacitive Sensor and Method and Apparatus for Controlling a Pump Using Same
US20110163776A1 (en) * 2010-01-04 2011-07-07 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Power supply testing system
US20140160678A1 (en) * 2012-12-11 2014-06-12 Hon Hai Precision Industry Co., Ltd. Fan driving system and electronic device using same
US9696360B2 (en) 2014-06-04 2017-07-04 Rf Group Llc Sump/ejector pump monitor and sump/ejector pump failure warning system
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
US11162496B2 (en) 2016-11-11 2021-11-02 Wayne/Scott Fetzer Company Pump with external electrical components and related methods

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CN101414211B (en) * 2007-10-18 2012-07-18 鸿富锦精密工业（深圳）有限公司 Power sensor detecting circuit
CN102562565B (en) * 2012-01-13 2015-04-22 杭州哲达科技股份有限公司 Method and device for water pump delivery inspection
JP5636555B2 (en) * 2012-04-02 2014-12-10 株式会社メトラン Pump unit, breathing assistance device

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8380355B2 (en) 2007-03-19 2013-02-19 Wayne/Scott Fetzer Company Capacitive sensor and method and apparatus for controlling a pump using same
US20080229819A1 (en) * 2007-03-19 2008-09-25 Wayne Water Systems, Inc./Scott Fetzer Company Capacitive Sensor and Method and Apparatus for Controlling a Pump Using Same
US20110163776A1 (en) * 2010-01-04 2011-07-07 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Power supply testing system
US8330448B2 (en) * 2010-01-04 2012-12-11 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Power supply testing system
US20140160678A1 (en) * 2012-12-11 2014-06-12 Hon Hai Precision Industry Co., Ltd. Fan driving system and electronic device using same
US11041908B2 (en) 2014-06-04 2021-06-22 Rf Group Llc Sump/ejector pump monitor and sump/ejector pump failure warning system
US9696360B2 (en) 2014-06-04 2017-07-04 Rf Group Llc Sump/ejector pump monitor and sump/ejector pump failure warning system
US9927479B2 (en) 2014-06-04 2018-03-27 Rf Group Llc Sump/ejector pump monitor and sump/ejector pump failure warning system
US11927637B2 (en) 2014-06-04 2024-03-12 Rf Group Llc Sump/ejector pump monitor and sump/ejector pump failure warning system
US11486401B2 (en) 2015-12-17 2022-11-01 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
US11162496B2 (en) 2016-11-11 2021-11-02 Wayne/Scott Fetzer Company Pump with external electrical components and related methods
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
USD1015378S1 (en) 2017-06-21 2024-02-20 Wayne/Scott Fetzer Company Pump components
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
USD1014560S1 (en) 2018-01-11 2024-02-13 Wayne/Scott Fetzer Company Pump components

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US20080157989A1 (en) 2008-07-03

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